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IAMWstDecoder interface

The IAMWstDecoder interface sets and retrieves information about World Standard Teletext (WST). The WST Decoder filter implements this interface.

Members

The IAMWstDecoder interface inherits from the IUnknown interface. IAMWstDecoder also has these types of members:

Methods

The IAMWstDecoder interface has these methods.

MethodDescription
GetAnswerMode

Retrieves whether hidden text is exposed or not.

GetBackgroundColor

Retrieves the current physical color used in color keying the background for overlay mixing.

GetCurrentPage

Retrieves the current WST page.

GetCurrentService

Retrieves the current WST service.

GetDecoderLevel

Retrieves the WST decoder level.

GetDrawBackgroundMode

Determines whether the caption text background is opaque or transparent.

GetHoldPage

Determines whether the current WST page is held by the WST decoder.

GetOutputFormat

Retrieves the current output video format.

GetRedrawAlways

Retrieves whether the whole output bitmap should be redrawn for each sample.

GetServiceState

Retrieves whether closed captioning is on or off.

SetAnswerMode

Assigns whether hidden text is exposed or not.

SetBackgroundColor

Assigns the current physical color used in color keying the background for overlay mixing.

SetCurrentPage

Assigns the current WST page.

SetDrawBackgroundMode

Assigns the caption text background to be opaque or transparent.

SetHoldPage

Instructs the WST decoder to hold the current page.

SetOutputFormat

Assigns an output video format.

SetRedrawAlways

Sets whether the whole output bitmap should be redrawn for each sample.

SetServiceState

Sets closed captioning on or off.

 

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

End of client support

Windows Vista

End of server support

Windows Server 2003 R2

Header

Iwstdec.h

Library

Strmiids.lib

 

 

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